1. Now Playing: Homecoming Kanye West from Graduation Released September 11, 2007

2. OpenGL Programming II Rick Skarbez, Instructor COMP 575 September 13, 2007

3. Robot Ate My Homework Mark Shirra Vancouver Film School, SIGGRAPH 2006 Available online: http://www.vfs.com/showcase.php?id=7&category_id=10&project_id=858 Available online: http://www.vfs.com/showcase.php?id=7&category_id=10&project_id=858

4. Announcements Reminder: Homework 1 is due today Questions? Class next Tuesday (9/18) will be held in SN 014

5. Introduced the basics of OpenGL programming OpenGL is a state machine All objects are lists of vertices 2 matrices in OpenGL ModelView Projection Last Time

6. Today Review a bit from last time Work through some demos Introduce/demo windowing toolkits GLUT FLTK

7. OpenGL in Java UPDATE: Apparently, the newest versions of Netbeans include JOGL bindings Check out http://unc-cs575- lerch.blogspot.com http://unc-cs575- lerch.blogspot.com Many thanks to Tae

8. Clearing the Screen glClearColor(0.0, 0.0, 0.0, 0.0) glClearDepth(1.0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) glClearColor(0.0, 0.0, 0.0, 0.0) glClearDepth(1.0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) To Clear The On-Screen Image And The Z-Buffer:

9. Our First OpenGL Code... glClearColor(0.0, 0.0, 0.0, 0.0); glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0, 1.0, 1.0); glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0); glBegin(GL_POLYGON); glVertex2f(-0.5, -0.5); glVertex2f(-0.5, 0.5); glVertex2f(0.5, 0.5); glVertex2f(0.5, -0.5); glEnd(); glFlush();... glClearColor(0.0, 0.0, 0.0, 0.0); glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0, 1.0, 1.0); glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0); glBegin(GL_POLYGON); glVertex2f(-0.5, -0.5); glVertex2f(-0.5, 0.5); glVertex2f(0.5, 0.5); glVertex2f(0.5, -0.5); glEnd(); glFlush();...

10. Drawing into a Window You specify what you want drawn with OpenGL But where are you drawing it? Need to call the OS to get a window Two ways to do this: 1. Make you learn the specifics of the operating / windowing system 2. Use a toolkit that hides the OS interface

11. UI Toolkits There are a lot of options to choose from: GLUT FLTK QT wxWindows Cocoa etc. I’m going to demonstrate GLUT today

12. GLUT OpenGL Utility Toolkit Cross-Platform C++ Drawing/UI Toolkit Provides functions to make starting up and drawing fast and easy Supports only limited user interfaces

13. Installing GLUT On Windows: Download from Nate Robins’ website: http://www.xmission.com/%7Enate/glut.ht ml http://www.xmission.com/%7Enate/glut.ht ml glut-3.7.6-bin has the dll/lib/header that are required Copy glut.dll to {Windows DLL dir}\glut32.dll Copy glut.lib to {VC++ lib path}\glut32.lib Copy glut.h to {VC++ include path}\GL\glut.h

14. Using GLUT Only need to include glut.h #include Automatically includes gl.h and glu.h Lighthouse3D has a good GLUT tutorial http://www.lighthouse3d.com/opengl/glut/ind ex.php?1 http://www.lighthouse3d.com/opengl/glut/ind ex.php?1

15. FLTK Fast Light Toolkit Cross-Platform C++ GUI Toolkit Provides more full-featured UI functionality than GLUT Also supports GLUT code through emulation Download from http://www.fltk.orghttp://www.fltk.org

16. Next Time Review of Assignment 1 Demo / discussion of Programming Assignment 1 Geometry & Modeling Will end early (~4:25) for Randy Pausch lecture